Question

embryology is a branch of science that studies embryos. similarities in embryonic development are evidence of evolution and common ancestry. a student made an observation at stage two of development of a fish embryo. which of the following is a possible observation and conclusion that the student could make? select one: a. more characteristics in common with reptiles, indicating a more recent common ancestor b. more characteristics in common with mammals, indicating a more recent common ancestor c. the same features as reptiles and birds, indicating a more recent common ancestor d. more characteristics in common with amphibians, indicating a more recent common ancestor

Explanation:

Embryonic similarities show evolutionary relationships; fish are more closely related to amphibians than to reptiles, mammals, or birds, so their early embryos share more traits, pointing to a more recent common ancestor.

Answer:

d. More characteristics in common with amphibians, indicating a more recent common ancestor